Lua.cli: improve lua 5.3 compatibility
Lua.cli: improve lua 5.3 compatibility

Close #14803

(cherry picked from commit ebe6e7de1bbdf7181cdbeca61b5591f9b31ac711)
Signed-off-by: Jean-Baptiste Kempf <7b85a41a628204b76aba4326273a3ccc74bd009a@videolan.org>

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2